Those have two 8" woofers with the buty rubberl surrounds and like vtomike said, a nice soft dome Peerless tweeter..and they do sound nice.
They do have a good build quality and the pair I had, had beautiful "parquet" veener
The swivel can come in handy for positioning. Have fun!

In about 1978 I bought a pair of Jennings Contrara Elan, with 2 8" drivers a mid and a tweeter plus the swivel base. I still have them, though they went out of favour several years ago. More recently, I decided to resurrect them and in particular renewed the gasket between the drivers and the cabinet so that manually moving one of the drivers moves the other. Over Christmas, I set them up against some AR9s, JBL 4311b, Rogers P22 and Altec model 9s and to my surprise liked them second only to the AR9s. I think a very underrated speaker.

I have a pair that need new tweets (don't ask why :/ ) and agree they tend to fly under the radar. It's probably because they're fairly uncommon, especially the further away from caifornia you are. My family is even involved in jennings research story a bit, but that's a tale for another time.

I went ahead and picked them up ($150) and have them hooked up to a Marantz 2270. I think they sound beautiful. I turned them up and am amazed at how clear they sound. Mine are the Contrara and are only 2-way, but the mid is there. I think it was a good call.

I know where there is a pair of Jennings Contrara Rectangle MK-I in walnut cabinets for a real decent price. Seller claims the are mint. I should probably post it in D & S so someone could grab them, hey?